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Home >> GMC >> 2018 >> Acadia SL >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 2.5L (LCV) - Repair Instructions >> Repair Instructions >> Fuel Injection Fuel Rail Assembly Replacement >> Installation Procedure
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Installation Procedure

  1. Use the EN-47909  cleaning kit to clean the cylinder head bores.
  2. If necessary, replace the fuel injection fuel rail insulators. Fuel Rail and Injectors Cleaning and Inspection
  3. GM2726739

    Install the fuel injection fuel rail (1), making sure the fuel injectors seat into the cylinder head evenly.

  4. Fig 1: Fuel Rail Bolts With Tightening Sequence
    GM2726740Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    To install the fuel injection fuel rail bolts, perform the following steps:

    1. First Pass: Start ALL bolts by hand, but do NOT tighten.
    2. Second Pass: Tighten the outer two bolts by hand to seat the fuel injectors.
    3. Third Pass: Tighten the remaining bolts by hand.
    4. Final Pass: Tighten ALL bolts in sequence to 25 N.m (18 lb ft).
  5. Connect the wiring harness to the fuel injection fuel rail harness.
  6. Fuel Injection Fuel Rail Fuel Pressure Sensor - Install - Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement 
  7. Fuel Feed Intermediate Pipe - Install NEW - Fuel Feed Intermediate Pipe Replacement 
  8. Fuel Injection Fuel Rail Noise Shield - Install - Fuel Injection Fuel Rail Noise Shield Replacement 
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